Safe-door



G. L. DAMON.

DOOR.

SAFE

No. 440,695 l Patented Nov. 1.8, 1890;

n D It m. V .Y

y M y UNITED STATES PATENT OFFICE.

GEORGE L. DAMON, OF BOSTON, MASSACHUSETTS.

SAFE-DOOR.

SPECIFICATION forming part of Letters Patent No. 440,695, dated November18, 1890.

Applioationiled July 19,1890. Serial No. 359,299. (No model.)

To @ZZ whom it may concern:

Be it known that I, GEORGE L. DAMON, of Boston, county of Suffolk, Stateof Massachusetts, have invented an Improvement in Safe- Doors, of whichthe following description, in connection with the accompanying drawing,is a specilication, like letters on the drawing representing like parts.

This invention relates to doors for safes, vaults, and otherdepositories or receptacles for money and valuables, and has for itsobject to improve the construction of the same, whereby they arerendered more burglarproof than the safe-doors as now constructed andknown to me.

The particular features in which 1n y invention consists will be pointedout in the claims at the end of this specification.

The drawing represents in transverse section a sufficient portion of asafe and its door to enable my invention to be understood.

In accordance with my invention the door A of the safe is made of anoutside or armor plate a, of soft rolled steel, and a series ofindependent plates or bars a', which are sccured to each other and tothe armor-plate by suitable bolts a2. The armor-plate a is re-enforcedand rendered proof against the action of a drill or other instrument inthe hands of a burglar by means of plugs l), preferably of Mushet steel,which are fitted into sockets or holes in the armor-plate before theiirst bar or plate a is secured in place. The armorplate a is furtherstrengthened at that portion which overlaps the jamb A of the safedoorby means of a bar bx, preferably of Mushet steel, which is dovetailedinshape and titted into a dovetailed slot or groove 1J in the armor-plate.

The plugs b are independent of the armorplate, so that they are free toturn with a drill or other instrument when the latter is forced throughthe armor-plate and into contact with the said plugs, thereby renderingit practically impossible to drill through the safe-door.

The jamb A of the safe-door has its outer plate b5 provided on its innerside with sockets or holes into which are iitted plugs b, preferably ofMushet steel, the said plugs being loose iu their sockets to permit themto be readily turned by a tool in case the outer plate b5 is penetrated.The heads of said plugs are tangential to each other, thus effectuallyprotecting the entire surface of the plate, and are also flush with theinner side of said plate. By such construction the outer plate only isprovided with sockets, and the flat inner plates can be attacheddirectly to the armor-plate.

Instead of Mushet steel I may use any metal having like properties, andtherefore an equivalent, as, for instance, so-called white castironchilled, or franklinite I use these metals because when heated by ablow-pipe they in cooling retain their hardness, they being so hard asnot to be punched by drills or boring or cutting tools.

The safe-door in practice will be hung upon hinges (not shown) in theusual manner now commonly employed.

I claim-n l. In a door for safes, Vaults, and other receptacles, thecombination, with an outside or armor plate provided with a dovetailedgroove or slot and having holes or sockets, and independent rotatableplugs iitted into the said sockets or holes, of a dovetailed bar fittedinto said dovetailed slot, and one or more bars or plates secured tothesaid armorplate, substantially as described.

2. The combination, with the door-jamb having its outer plate providedon its inner side with sockets or holes, of plugs b, itted into saidsockets, the heads of said plugs being tangential to each other andflush With the inner surface of said plate, substantially as described.-

In testimony whereof I have signed my name to this speciiication in thepresence of two subscribing witnesses.

